19887725

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{5563}}^1$

素因数の和:5597

約数の個数: 24

約数和(自身を含む): 28977312

約数和(自身を除く): 9089587

約数列:

[1, 5, 11, 13, 25, 55, 65, 143, 275, 325, 715, 3575, 5563, 27815, 61193, 72319, 139075, 305965, 361595, 795509, 1529825, 1807975, 3977545, 19887725]

約数ペア:

[(1, 19887725), (5, 3977545), (11, 1807975), (13, 1529825), (25, 795509), (55, 361595), (65, 305965), (143, 139075), (275, 72319), (325, 61193), (715, 27815), (3575, 5563)]